The Decoding Time to Sample Box contains a compact version of a table

that allows indexing from decoding time to sample number. Other tables give sample sizes and pointers, from the sample number. Each entry in the table gives the number of consecutive samples with the same time delta, and the delta of those samples. By adding the deltas a complete time-to-sample map may be built.

The Decoding Time to Sample Box contains decode time delta's: DT(n+1) = DT(n)

• STTS(n) where STTS(n) is the (uncompressed) table entry for sample n.

The sample entries are ordered by decoding time stamps; therefore the deltas are all non-negative.

The DT axis has a zero origin; DT(i) = SUM(for j=0 to i-1 of delta(j)), and the sum of all deltas gives the length of the media in the track (not mapped to the overall timescale, and not considering any edit list).

The Edit List Box provides the initial CT value if it is non-empty (non-zero).

• author: Sven Vollbehr <svollbehr@gmail.com>
• version: $Rev: 92 $
• copyright: Copyright (c) 2008 The PHP Reader Project Workgroup
• license: New BSD License

Located in /ISO14496/Box/STTS.php (line 70)

ISO14496_Box
   |
   --ISO14496_Box_Full
      |
      --ISO14496_Box_STTS

Inherited Variables

Inherited from ISO14496_Box_Full

ISO14496_Box_Full::$_flags
ISO14496_Box_Full::$_version

Inherited from ISO14496_Box

ISO14496_Box::$_reader

Inherited Methods

Inherited From ISO14496_Box_Full

ISO14496_Box_Full::__construct()
ISO14496_Box_Full::getFlags()
ISO14496_Box_Full::getVersion()
ISO14496_Box_Full::hasFlag()
ISO14496_Box_Full::setFlags()
ISO14496_Box_Full::setVersion()
ISO14496_Box_Full::__toString()

Inherited From ISO14496_Box

ISO14496_Box::__construct()
ISO14496_Box::addBox()
ISO14496_Box::constructBoxes()
ISO14496_Box::getBoxes()
ISO14496_Box::getBoxesByIdentifier()
ISO14496_Box::getContainer()
ISO14496_Box::getOffset()
ISO14496_Box::getOption()
ISO14496_Box::getOptions()
ISO14496_Box::getParent()
ISO14496_Box::getSize()
ISO14496_Box::getType()
ISO14496_Box::hasBox()
ISO14496_Box::isContainer()
ISO14496_Box::setContainer()
ISO14496_Box::setOffset()
ISO14496_Box::setOption()
ISO14496_Box::setOptions()
ISO14496_Box::setParent()
ISO14496_Box::setSize()
ISO14496_Box::setType()
ISO14496_Box::__get()
ISO14496_Box::__isset()
ISO14496_Box::__set()
ISO14496_Box::__toString()
ISO14496_Box::__unset()